Brightwell Calcion Liquid Calcium 17 oz. (500 ml)
Highly-concentrated ionic calcium solution designed to increase calcium levels in marine aquarium water. Essential for coral and reef-building invertebrates, supporting healthy growth and skeletal development.
Formulated by a marine scientist, this product delivers calcium in ionic form, without chelation. Contains no EDTA, gluconate, or polygluconate—ensuring a clean, pure calcium source free from organic additives.
Free of phosphate and silicate, making it safe for sensitive reef ecosystems. Over 50% stronger than most competing calcium supplements.
| Specification | Value |
|---|---|
| Volume | 17 oz (500 ml) |
| Calcium Type | Ionic |
| Contains | Calcium, no EDTA, gluconate, polygluconate, phosphate, silicate |
| Formulated By | Marine Scientist |
FAQ
Is this calcium supplement safe for sensitive reef species?
Yes, it is free of phosphate, silicate, and organic materials like EDTA, making it safe for sensitive reef species.
How does ionic calcium differ from chelated calcium?
Ionic calcium is directly available to marine organisms and does not require chelation. It is more readily absorbed and does not introduce organic compounds that may interfere with reef health.
Can this product be used in a reef tank with live corals?
Yes, it is specifically formulated for use in reef aquariums and is safe for corals and other reef-building invertebrates.
Hannah Paterson –
Used this in my 100-gallon reef tank for three months. Corals have grown stronger and more vibrant. No signs of cloudiness or algae issues. The calcium levels stayed stable after regular dosing.
Carolyn Walker –
Great product—clearly formulated for reef tanks. I’ve used it alongside other supplements and noticed a noticeable improvement in polyps and skeletal structure of my staghorn corals.
Ava Roberts –
Works well in my tank. The calcium levels are consistent, and I haven’t seen any negative effects on my fish or invertebrates. A bit more concentrated than other brands I’ve tried.
Warren Buckland –
After switching from a chelated calcium product, I saw better coral growth. No organic additives, which is a relief. Easy to measure and mix into the water.